[ambarata]

Originally Posted by Hitman

As designed in the mod

This is the result of simulating real buoyancy in the extent that the game allows it. Another take on the same problem is what GWX does by adding the opposite effect, positive buoyancy. Real WW2 submarines could not stay at constant depth for long if stopped, they needed some speed for the dive planes to act and "lift" or keep the boat down by constant minor corrections (Like an airplane's wings).

Thus: Never go below 2 knots or your sub will keep sinking slowly. For more info, read the NYGM manual, it is well explained there (The feature is called "Anti-humming bird")

Thank you!

and keep the good work

AMBarata